Vehicle lighting tool

Abstract

In a vehicular lamp, power consumption during the realization of high beams is efficiently reduced so as to downsize a heat radiating member. Disclosed is a vehicular lamp including a plurality of first light sources for low beams, a plurality of second light sources for high beams, a heat radiating member thermally connected to the plurality of first light sources and the plurality of second light sources, and a control device configured to control the plurality of first light sources and the plurality of second light sources, and the control device turns on all of the plurality of first light sources during realization of low beams and, during realization of high beams, turns on all of the plurality of second light sources and turns on some or all of the plurality of first light sources in a state where a lower electric power is consumed as compared with electric power consumed by the plurality of first light sources during the realization of low beams.

1 . A vehicular lamp comprising:
 a plurality of first light sources for low beams;   a plurality of second light sources for high beams;   a heat radiating member thermally connected to the plurality of first light sources and the plurality of second light sources; and   a control device to control the plurality of first light sources and the plurality of second light sources,   wherein the control device turns on all of the plurality of first light sources during realization of low beams and, during realization of high beams, turns on all of the plurality of second light sources and turns on some or all of the plurality of first light sources in a state where a lower electric power is consumed as compared with electric power consumed by the plurality of first light sources during the realization of low beams.   
     
     
         2 . The vehicular lamp according to  claim 1 ,
 wherein the plurality of first light sources and the plurality of second light sources are mounted on a substrate in common, and   wherein the plurality of first light sources and the plurality of second light sources are thermally connected to the heat radiating member through the substrate.   
     
     
         3 . The vehicular lamp according to  claim 1 , wherein the control device turns on some or all of the plurality of first light sources during the realization of high beams to cause electric power consumed by the plurality of first light sources and the plurality of second light sources to be equal to the electric power consumed by the plurality of first light sources during the realization of low beams. 
     
     
         4 . The vehicular lamp according to  claim 1 ,
 wherein the plurality of first light sources and the plurality of second light sources have identical characteristics, and   wherein the plurality of first light sources exceed the plurality of second light sources in number.   
     
     
         5 . The vehicular lamp according to  claim 1 ,
 wherein the plurality of first light sources are aligned in a lateral direction, and   wherein, during the realization of high beams, the control device turns off a first light source among the plurality of first light sources that is at an end in the lateral direction.